Dynamic Call to Java Class or Method

Question

Hi All,
I have a requirement to call a Class or a Method Within the same class dynamically based on the user choice. I will give an example with how I do it in pl sql.
begin
if (choice = 1) then
execute immediate 'package.procedure1(params)';
elsif (choice = 2) then
execute immediate 'package.procedure2(params)';
else
execute immediate 'package.procedure3(params)';
end if;
end;
From the Example above, I call a program based on user choice. How Can I do the same in Java?
Thank you.
Edited by: Eric S. on Jul 6, 2011 9:52 AM

Answer 1

I have a requirement to call a Class or a MethodYou can call a method, but not the Class where as you can instantiate the Class.
I will give an example with how I do it in pl sql.
begin
if (choice = 1) then
execute immediate 'package.procedure1(params)';
elsif (choice = 2) then
execute immediate 'package.procedure2(params)';
else
execute immediate 'package.procedure3(params)';
end if;
end;
From the Example above, I call a program based on user choice. How Can I do the same in Java?The similar way. Here it takes the following structure.
ClassA object = new ClassA();
if(choice==1) {
      object.callMethod1();
} else if(choice==2) {
      object.callMethod2();
} else if(choice==3) {
      object.callMethod3();
} Also you can switch case instead of if else. It takes the following structure.
ClassA object = new ClassA();
switch(choice) {
case 1:  object.callMethod1(); break;
case 2:  object.callMethod2(); break;
case 3:  object.callMethod3(); break;
}I recommend you to go with the second one which using switch.